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_ r installed within the boreholes to a maximum depth of 40 feet below ground surface. The site plan and monitor well location map with soil analytical data is shown in Figure 2. 3.1 Soil and Groundwater Sampling and Analysis Per LUFT and Regional Water Quality Control Board recommendations, the soil samples collected were analyzed for TPH by EPA Method 8015 Modified, for benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA Method 8020, and for total lead by EPA Method 6010 The groundwater samples collected were analyzed for TPH by EPA Method 8015 Modified, for BTEX by EPA Method 602, and for total lead by EPA Method 7421. 3.2 Soil Sampling and Monitoring Well Construction Procedures Pnor to any field work a Health and Safety Plan, required by OSHA regulations, was prepared The Health and Safety PIan included a task risk analysis and an emergency response plan. In addition to the Health and Safety Plan, a utility clearance was conducted by Subtronics Corporation personnel at all sampling locations prior to any field activity. Underground Service Alert (USA) was contacted to notify utility companies to mark underground utilities at the drilling locations. The monitor wells were dnlled using a Mobile B-53 dell ng utilizing 8-inch outer diameter hallow stem augers by Gregg Drilling and Testing, Inc. Soil samples were collected during drilling at five foot intervals to the termination of the borehole utilizing an 18-inch split • spoon sampler lined with three six-inch long brass tubes dnven by a 140 pound hammer dropped 30 inches The soil samples were logged and classified using the Unified Soil Classification System (USCS), Munsell soil color charts, and moisture content. The soil bonng logs are presented in Appendix I Soil samples were selected for chemical analysis based on readings from a field photoionization detection device (PID) At each sample depth, a representative soil sample of approximately 400 grams was collected and placed into a resealable plastic bag to be field screened to determine the presence or absence of volatile organic compounds (VOCs) in the soil headspace The bag of soil was placed in the sun for 5 minutes to enable the gasses in the soil to come to equilibrium inside the atmosphere of the bag The PID nozzle was placed inside the bag to measure the VOC concentration in the soil headspace. Soil samples that exhibited a positive VOC concentration were submitted for laboratory analysis. The sample intervals that had a zero VOC concentration that were immediately above and below the interval(s) exhibiting a positive VOC concentration as well as the soil sample collected at the termination of the borehole were also submitted for laboratory analysis. The soil headspace readings are noted on the boring logs in Appendix I Before each soil sample was collected, all soil sampling equipment was decontaminated, in Liqumox (a degreasing agent) and tap water solution and rinsed twice, first in tap water and then in deionized water niigican 6